Soil acidity is a major constraint to successful crop production in many highly weathered tropical soils. While liming of temperate soils causes immediate and favorable changes, tropical soils often react differently. Where ...

The objectives of this study were: to determine the external and internal P requirements of four cereal crops (wheat, millet, sorghum and maize); to determine the relationship between P uptake by maize and the volume of ...

The over goal of this project was to understand the physiological mechanisms by which pineapple (Ananas comosus [L.] Merr.), a species having Crassulacean acid metabolism (CAM), will respond to the increase in atmospheric ...

This study was conducted to evaluate the effects of N and K availability on physiological characteristics of two sugarcane (Saccharum spp. hybrid) cultivars which were previously shown to differ in their resistance to ...

Our ability to effectively manage the Rhizobium-legume symbiosis is often limited by the saprophytic performance of rhizobia prior to infection of the host and subsequent nitrogen fixation. A series of investigations on ...

Primary productivity and resource use was measured in montane Metrosideros polymorpha forest across a 4.1 x 10^6 year chronosequence where available pools of soil nitrogen and phosphorus varied with site age. At the oldest ...

Results of the effect of nitrogen (N) on legume dry matter (DM) and N accumulation are mixed. This study measured whole plant OM and N accumulation by legumes grown at different levels of soil N. Two field experiments ...

Studies using greenhouse-grown plants of sugarcane cultivars known to have varying levels of resistance to drought were conducted to identify distinctive physiological features that may confer drought resistance in sugarcane. ...

The basic primary and secondary processes of soil erosion by water are not well understood for Hawaii's soils despite substantial research and empirical information on overall factors. A series of laboratory and field ...

Variable charge clay soils are widely distributed in the intertropical region. They primarily consist of Andisols, Oxisols, and low activity clay Alfisols and Ultisols. The last three groups of soils are collectively called ...

The nonfumigant nematicide, fenamiphos [Nemacur^R , ethyl-3-methyl-4-(methylthio) phenyl (l-methyl-ethyl) phosphoramidate] has been increasingly used for controlling nematodes in Hawaii pineapple and various other crops ...